Our Polypropylene Mats are made to absorb moisture from shoes better than any other mat. They are often combined with rubber to give it durability aswell as great absorbency. *Please note: Mats sizes may vary +/- 5%. Products that have natural rubber in it, may cause a plasticiser migration reaction to occur on PVC & Vinyl floors. We strongly recommend against using this product on Vinyl, PVC & decorative flooring.